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16th Microlensing Season of the Optical Gravitational Lensing Ex periment

A. Udalski Warsaw University Observatory. 16th Microlensing Season of the Optical Gravitational Lensing Ex periment. OGLE: The Optical Gravitational Lensing Experiment (1992 - ….). http://ogle.astrouw.edu.pl http://bulge.princeton.edu/~ogle. Three Phases of the OGLE Project.

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16th Microlensing Season of the Optical Gravitational Lensing Ex periment

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  1. A. Udalski Warsaw University Observatory 16th Microlensing Season of the Optical Gravitational Lensing Experiment

  2. OGLE: The Optical Gravitational Lensing Experiment (1992 - ….) http://ogle.astrouw.edu.pl http://bulge.princeton.edu/~ogle

  3. Three Phases of the OGLE Project • OGLE-I (1992-1995). 1 m Swope telescope at LCO. ~2 million stars observed. Microlensing • OGLE-II (1997-2000). 1.3 m Warsaw telescope. ~40 million stars observed. Variable and non-Variable Stars in GB, MC • OGLE-III (2001-….). 8k x 8k mosaic CCD. ~200 million stars observed (GB, GD, MC). Extrasolar Planets, Microlensing

  4. Las Campanas Observatory, Chile

  5. OGLE-I Results. Microlenses: Discovery of the first events toward the GB (1993).

  6. First Binary Microlensing (1994)

  7. Early Warning System (EWS – 1994)

  8. Microlensing Optical Depth: • First empirical determination (1994): τ = 3.3 x 10-6

  9. OGLE-II (1997—2000) • New telescope – new targets: Magellanic Clouds • New CCD Camera – drift scan mode • ~40 million stars regularly observed • Variable and non-Variable Stars in GB, MC, gravitational micro and lensing • Distance scale

  10. 1.3 m Warsaw Telescope at LCO

  11. Night at LCO

  12. Cepheids in the MC. PL relations. Hubble constant is based on OGLE PL relations

  13. Pulsating Red Giants

  14. Eclipsing Stars (Good distance indicators)

  15. Gravitational Lensing. The Einstein Cross.

  16. Gravitational Lensing: HE1104—1805

  17. OGLE-III (2001-…) • New 8192 x 8192 pixel mosaic CCD camera (0.26 arcsec/pixel scale): 0.5 x 0.5 sq. degree • 1.3 m OGLE telescope at Las Campanas Observatory, Chile • Data Pipeline: photometry derived with image subtraction method (accuracy up to 3 mmag for the brightest stars over a few months long observing run) • OGLE back in operation on June 12, 2001 • ~200 million stars regularly observed (GB, GD, MC) • Extrasolar planets, low luminosity objects

  18. Warsaw Telescope and 8192x8192 pixel Mosaic Camera

  19. Typical OGLE-III Microlensing Season • EWS Alert System: ~600 microlensing detections (~20 during OGLE-I all four seasons; ~60 per season in OGLE-II) • EEWS Alert System: ~25 real time anomaly detections • Several high magnification events, several binary microlensings • ~<2-3 planetary microlensings

  20. Planetary Microlensing – Observing Strategy • Detection of microlensing events in early phases by the large survey programs like OGLE or MOA • Follow-up of the most promising events by follow-up programs like microFun, PLANET/ROBONET and survey programs in follow-up mode (OGLE, MOA) • OGLE – real time alert system (EEWS) detecting anomalies in the light curve of microlensing events (enabling fast switch to from survey to follow-up observing mode)

  21. 2007 Microlensing Season • EWS Alert System: ~600 microlensing detections • EEWS Alert System: ~20 real time anomaly detections • Several high magnification events, several binary microlensings

  22. Magellanic Cloud Microlensing

  23. Fake „early” microlenses

  24. Magellanic Clouds MicrolensingOGLE-2007-LMC-001

  25. Magellanic Clouds MicrolensingOGLE-2008-SMC-001

  26. OGLE-2005-SMC-001

  27. 2007 Galactic BulgeMicrolensing Season

  28. 2007 Season MicrolensingOGLE-2007-BLG-050

  29. 2007 Microlensing Season:OGLE-2007-BLG-224

  30. 2007 Microlensing Season:Spectacular Event OGLE-2007-BLG-355

  31. 2007 Microlensing Season:OGLE-2007-BLG-368 Planetary microlensing.

  32. 2007 Microlensing Season:OGLE-2007-BLG-349 Planetary microlensing

  33. 2007 Microlensing Season:OGLE-2007-BLG-472 Small q microlensing.

  34. 2007 Microlensing Season:OGLE-2007-BLG-514 Planetary microlensing?

  35. 2007 Microlensing Season:MOA 2007-BLG-192 Planetary microlensing.

  36. 2007 Microlensing Season:High Magnification Events

  37. 2007 Microlensing Season:Short time-scale microlensing tE=1.8 days tE=0.8 days

  38. Gravitational LensingEinstein Cross – 2007

  39. Eleven Years Monitoring of the Einstein Cross

  40. MISC

  41. OGLE-TR-182 astro-ph/0710.5278 P=3.97910 days, Mp=1.01+/-0.15 MJ, Rp=1.13 +0.24-0.08 RJ Typical hot Jupiter.

  42. OGLE-TR-211 astro-ph/0711.3978 P=3.67724 days, Mp=1.03 +/- 0.20 MJ, Rp=1.36 +0.18-0.09 RJ Radius ~20% larger than that of typical hot Jupiter: another „inflated” hot Jupiter.

  43. OGLE 2008 Plans • Microlensing campaign – 2007 setup • New mosaic camera with larger field of view

  44. OGLE-IV New OGLE Mosaic Camera – 1.4 square degree field • Contract with E2V signed – 13 chips out of 34 already delivered • Expected first light – Early 2009 • ~10 times larger data flow compared to OGLE-III

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